linux-hardening - Re: [PATCH V2] ACPI: APEI: Use ERST timeout for slow devices

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Message-ID: <20231024152708.GFZTfiTL9C6onZKn99@fat_crate.local>
Date: Tue, 24 Oct 2023 17:27:08 +0200
From: Borislav Petkov <bp@...en8.de>
To: "Rafael J. Wysocki" <rafael@...nel.org>
Cc: Jeshua Smith <jeshuas@...dia.com>, "Luck, Tony" <tony.luck@...el.com>,
	"james.morse@....com" <james.morse@....com>,
	"keescook@...omium.org" <keescook@...omium.org>,
	"gpiccoli@...lia.com" <gpiccoli@...lia.com>,
	"lenb@...nel.org" <lenb@...nel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-hardening@...r.kernel.org" <linux-hardening@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	Thierry Reding <treding@...dia.com>,
	Jonathan Hunter <jonathanh@...dia.com>
Subject: Re: [PATCH V2] ACPI: APEI: Use ERST timeout for slow devices

On Tue, Oct 24, 2023 at 04:32:48PM +0200, Rafael J. Wysocki wrote:
> So there are 3 designated reviewers for APEI: Tony Luck, Borislav
> Petkov and James Morse.  I need an ACK or Reviewed-by from one of
> them, so I can proceed with an APEI patch.

Here's what I see:

cat /tmp/patch | ./scripts/get_maintainer.pl
Kees Cook <keescook@...omium.org> (supporter:PSTORE FILESYSTEM)
Tony Luck <tony.luck@...el.com> (reviewer:PSTORE FILESYSTEM)
"Guilherme G. Piccoli" <gpiccoli@...lia.com> (reviewer:PSTORE FILESYSTEM)
"Rafael J. Wysocki" <rafael@...nel.org> (unknown:ACPI APEI)
Len Brown <lenb@...nel.org> (reviewer:ACPI APEI)
James Morse <james.morse@....com> (reviewer:ACPI APEI)
Borislav Petkov <bp@...en8.de> (reviewer:ACPI APEI)

so I'm guessing Kees, Tony, Guilherme ...

>From what I can see, the change itself is making me ask more questions:

When I see "may" in commit messages "Slow devices such as flash may not
meet the default 1ms timeout value" then I wanna know what devices are
those?

What is the actual use case here?

Upthread there's a question about the ACPI spec. That should be
explained too. Because I have no clue what "the ERST max execution time
value" is.

And so on.

HTH.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette